thrombus

noun

Etymology: Borrowed from New Latin thrombus, from the Ancient Greek θρόμβος (thrómbos, “lump, piece, blood clot, milk curd”); compare thrombo-.

1. A blood clot formed from platelets and other elements that forms in a blood vessel in a living organism, and causes thrombosis or obstruction of the vessel at its point of formation or travel to other areas of the body.